Anisotropic energy cascade rate ϵ(ℓ_⊥, ℓ_∥) in the parallel-perpendicular increment plane (assuming gyrotropy). Top: Full simulation grid solution (benchmark). Middle: HS with smaller separations (kinetic scales). Bottom: HS with larger separations (inertial scales). Even with limited coverage, HS recovers the scale-dependent anisotropic trend. Different configurations cover different portions of the increment space. The coverage on the simulation grid and HS are delimited with solid and dashed gray boxes, respectively. The black lines are isocontours of the energy transfer rate.